Java Formatter
Format and beautify Java code with Google/Oracle-style indentation and brace placement. Cleans up spacing, normalises imports, and structures your Java for readability.
Java Code Style Conventions
Java has two dominant style guides: the Oracle Code Conventions (the original Sun standard) and the Google Java Style Guide. Both use 4-space indentation and opening braces on the same line (K&R style). The Google style additionally enforces 2-space indentation for blocks, though 4-space is more common in enterprise Java. Tools like Checkstyle, Google Java Format, and IntelliJ's built-in formatter enforce these styles automatically.
Frequently Asked Questions
int is a primitive type — it stores a raw 32-bit integer value and cannot be null. Integer is a wrapper class that boxes an int into an object, allowing null values and use in collections. Java automatically autoboxes between the two, but using Integer has overhead. Prefer int for performance-critical code.Enjoying this tool?
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What is Java Formatter?
Java Formatter is a free online utility designed to help developers, designers, and technical professionals work more efficiently. This tool runs entirely in your browser — no installation required, no data sent to any server.
How to Use Java Formatter
- Paste or type your input in the editor area above.
- Click the action button to process your content.
- Copy the output or download the result.
Key Features
- 100% Free — No registration or payment required.
- Client-side Processing — Your data never leaves your browser.
- Instant Results — Get output in milliseconds.
- No Installation — Works directly in your web browser.
- Mobile Friendly — Works on phones, tablets, and desktops.
Who Uses Java Formatter?
This tool is widely used by web developers, software engineers, data analysts, students, and IT professionals who need a quick and reliable way to process data without setting up complex software environments.